mailinfo: avoid violating strbuf assertion

In handle_from, we calculate the end boundary of a section
to remove from a strbuf using strcspn like this:

  el = strcspn(buf, set_of_end_boundaries);
  strbuf_remove(&sb, start, el + 1);

This works fine if "el" is the offset of the boundary
character, meaning we remove up to and including that
character. But if the end boundary didn't match (that is, we
hit the end of the string as the boundary instead) then we
want just "el". Asking for "el+1" caught an out-of-bounds
assertion in the strbuf library.

This manifested itself when we got a 'From' header that had
just an email address with nothing else in it (the end of
the string was the end of the address, rather than, e.g., a
trailing '>' character), causing git-mailinfo to barf.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-mailinfo.c b/builtin-mailinfo.c
index 26d3e5d7af1c9d0f4e0e00143ed157f81ee595d0..e890f7a6d1ff7248aed4f03ebbcdfafd7e472dad 100644 (file)
--- a/builtin-mailinfo.c
+++ b/builtin-mailinfo.c
@@ -107,7 +107,7 @@ static void handle_from(const struct strbuf *from)
        el = strcspn(at, " \n\t\r\v\f>");
        strbuf_reset(&email);
        strbuf_add(&email, at, el);
-       strbuf_remove(&f, at - f.buf, el + 1);
+       strbuf_remove(&f, at - f.buf, el + (at[el] ? 1 : 0));
 
        /* The remainder is name.  It could be "John Doe <john.doe@xz>"
         * or "john.doe@xz (John Doe)", but we have removed the

diff --git a/t/t5100-mailinfo.sh b/t/t5100-mailinfo.sh
index 8dfaddda9129b476016afa88c518e51511da878c..198e3503d53c109e5090e213914ee23360c06902 100755 (executable)
--- a/t/t5100-mailinfo.sh
+++ b/t/t5100-mailinfo.sh
@@ -43,4 +43,15 @@ test_expect_success 'Preserve NULs out of MIME encoded message' '
 
 '
 
+test_expect_success 'mailinfo on from header without name works' '
+
+       mkdir info-from &&
+       git mailsplit -oinfo-from "$TEST_DIRECTORY"/t5100/info-from.in &&
+       test_cmp "$TEST_DIRECTORY"/t5100/info-from.in info-from/0001 &&
+       git mailinfo info-from/msg info-from/patch \
+         <info-from/0001 >info-from/out &&
+       test_cmp "$TEST_DIRECTORY"/t5100/info-from.expect info-from/out
+
+'
+
 test_done

diff --git a/t/t5100/info-from.expect b/t/t5100/info-from.expect
new file mode 100644 (file)
index 0000000..c31d2eb
--- /dev/null
+++ b/t/t5100/info-from.expect
@@ -0,0 +1,5 @@
+Author: bare@example.com
+Email: bare@example.com
+Subject: testing bare address in from header
+Date: Sun, 25 May 2008 00:38:18 -0700
+

diff --git a/t/t5100/info-from.in b/t/t5100/info-from.in
new file mode 100644 (file)
index 0000000..4f08209
--- /dev/null
+++ b/t/t5100/info-from.in
@@ -0,0 +1,8 @@
+From 667d8940e719cddee1cfe237cbbe215e20270b09 Mon Sep 17 00:00:00 2001
+From: bare@example.com
+Date: Sun, 25 May 2008 00:38:18 -0700
+Subject: [PATCH] testing bare address in from header
+
+commit message
+---
+patch